Satoru Kitaoka

A leg lock specialist, Kitaoka would improve to 19-7-9 before facing Katsuya Inoue on January 30, 2008 for the third time after being defeating in their first meeting and a draw in the previous bout. Kitaoka lost via split decision.

Kitaoka returned to face Tatsuya Kawajiri at RIZIN: Heisei's Last Yarennoka! for New Year's Eve in 2018. After a fairly impressive performance which included a surprising Kitoka knockdown from a left cross, Kitoaka won via split decision.

Kitaoka next faced Yusuke Yachi on July 30, 2017, at Rizin FF 6: RIZIN World Grand Prix 2017 Opening Round Part 1. He lost the fight via TKO in the second round.

Kitoaka returned at RIZIN World Grand Prix 2017: Second Round, facing Kiichi Kuniomoto in a catchweight bout of 165 lbs. Kitoka lost via unanimous decision.

Kitaoka made his debut for Rizin Fighting Federation in 2016. He faced Daron Cruickshank on December 29, 2016, at RIZIN World Grand-Prix 2016: 2nd Round and won the fight via technical submission in the first round.

Renowned originally for his catch wrestling abilities, Kitaoka made his professional debut for Pancrase on October 31, 2000, losing via majority decision. After submitting then 3-0 Kurt Pellegrino, Kitaoka drew with Heath Sims before losing to Katsuya Inoue. After picking up two wins to start 2005, Kitaoka improved to 12-6-8 before he faced future UFC interim welterweight champion Carlos Condit on October 2, 2005. Kitaoka defeated Condit in an upset, submitting him with a heel hook at 3:57 of the first round.

The Lightweight tournament win set up Kitaoka to fight the last reigning PRIDE Lightweight Champion, Takanori Gomi, for Sengoku's newly created Sengoku Lightweight Championship. The two fought at Sengoku no Ran 2009 on 4 January 2009 and ended with Kitaoka defeating Gomi with an achilles lock at 1:41 of the first round.

In his first title defence, on August 2, 2009, at World Victory Road Presents: Sengoku 9, Kitaoka lost his lightweight championship to Mizuto Hirota.

After signing with World Victory Road, Kitaoka's first fight for Sengoku was a submission win over Ian James Schaffa at Sengoku 2 on 18 May 2008 before entering Sengoku's eight-man lightweight tournament. In the first round of the tournament at Sengoku 4 on 24 August 2008 he was put up against American Clay French. Kitaoka made short work of French, winning by submission due to an achilles lock at 1:21 of the first round. The win put him up against fellow Japanese fighter Eiji Mitsuoka in the tournament's semifinal taking place at World Victory Road Presents: Sengoku 6. Kitaoka again made short work of his opponent winning by a heel hook submission at 1:16 of the first round. The win earned him a place in the tournament's final taking place that same night against Kazunori Yokota. The fight proved longer than Kitaoka's three previous fights as it went the distance completing all three five-minute rounds with Kitaoka being awarded the unanimous decision, thus winning the 2008 Sengoku Lightweight Grand Prix.

Satoru Kitaoka (北岡悟 , Kitaoka Satoru, born 4 February 1980) , is a Japanese shoot wrestler and mixed martial artist who most recently competed for RIZIN. A professional competitor since 2000, he has also competed for DREAM, Pancrase, DEEP, and World Victory Road. Kitaoka is renowned for his Catch wrestling abilities which he learned studying under two of Japan's most respected catch wrestlers Masakatsu Funaki and Minoru Suzuki. He is also a Brazilian jiu jitsu blackbelt under former Shooto welterweight champion Yuki Nakai. He was the inaugural Sengoku Lightweight Champion as well as the former DEEP Lightweight Champion. 18 of his 20 career submission wins have ended via guillotine choke or leg lock.